Jackson sets Major League Baseball record with Jays debut

With the performance, Guerrero (20 years, 59 days) became the third-youngest player in league history to hit his first two career homers in the same game, according to Stats By STATS.

The first home run came in the game's very first inning when he stepped to the plate and sent Nick Vincent's pitch well over the wall in the straight-away centerfield.

Vlad Guerrero Jr. waited 13 games for his first Major League Baseball home run.

Guerrero, in his 14th major-league game since he was called up from Triple-A Buffalo on April 26, gave the Blue Jays a 1-0 lead with his first homer, a solo shot which travelled an estimated 438 feet and had an exit velocity of 111.3 miles per hour.

In addition to the Blue Jays and A's, Jackson has played for the Los Angeles Dodgers, Tampa Bay, Detroit, Arizona, the Chicago White Sox, St. Louis, Washington, the Chicago Cubs, Atlanta, Miami, San Diego and Baltimore.

Ainge, the Boston Celtics president of basketball operations, had held the Blue Jays' record since 1979 before Guerrero Jr. set a new mark with 18 days to spare. And then for the son of the Hall of Famer to show the same prodigious power that put his father in Cooperstown.